CN104753327A - Switching power supply - Google Patents
Switching power supply Download PDFInfo
- Publication number
- CN104753327A CN104753327A CN201310741964.7A CN201310741964A CN104753327A CN 104753327 A CN104753327 A CN 104753327A CN 201310741964 A CN201310741964 A CN 201310741964A CN 104753327 A CN104753327 A CN 104753327A
- Authority
- CN
- China
- Prior art keywords
- power supply
- switching power
- circuit
- standby voltage
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
- H02M1/348—Passive dissipative snubbers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
- Relay Circuits (AREA)
Abstract
The invention relates to a switching power supply, which comprises a rectification and filtering circuit, wherein the rectification and filtering circuit can carry out filtering and rectification processing on AC power supply signals and output a voltage signal, and the rectification and filtering circuit comprises a thermistor. The switching power supply further comprises a standby voltage conversion circuit connected with the rectification and filtering circuit and a relay driving circuit connected with the standby voltage conversion circuit, wherein the relay driving circuit comprises a relay connected with the thermistor, the standby voltage conversion circuit does not convert the voltage signal into standby voltage yet at the moment when the switching power supply is started, a relay stays at an off-state, and the thermistor can reduce starting impact current of the switching power supply; and the standby voltage conversion circuit converts the voltage signal into standby voltage when the switching power supply is completely turned on, and the relay is located at a closed state so as to enable the thermistor to be short circuited, thereby reducing power consumption of the switching power supply.
Description
Technical field
The present invention relates to a kind of Switching Power Supply, espespecially a kind of Switching Power Supply that can reduce start impulse current.
Background technology
Switching Power Supply adopts the electric capacity of high voltage large capcity to carry out filtering and energy storage, at Switching Power Supply booting moment, due to capacitance characteristic, there is of short duration imaginary short state in Switching Power Supply, cause the starup current of Switching Power Supply large especially, easily burn other electronic devices and components in circuit.
Summary of the invention
In view of above content, be necessary to provide a kind of Switching Power Supply that can reduce start impulse current.
A kind of Switching Power Supply, comprise a current rectifying and wave filtering circuit, described current rectifying and wave filtering circuit exports a voltage signal after carrying out filter rectification process to ac supply signal, described current rectifying and wave filtering circuit comprises a thermistor, described Switching Power Supply also comprises a standby voltage change-over circuit be connected with described current rectifying and wave filtering circuit and a relay drive circuit be connected with described standby voltage change-over circuit, described relay drive circuit comprises the relay be connected with described thermistor, described Switching Power Supply booting moment, described voltage signal is not yet converted to a standby voltage by described standby voltage, described relay is in off-state, described thermistor can reduce the start impulse current of described Switching Power Supply, after described Switching Power Supply is opened completely, described voltage signal is converted to a standby voltage by described standby voltage, and described relay is in closure state and makes described thermistor short circuit to reduce the energy consumption of Switching Power Supply.
In one embodiment, described current rectifying and wave filtering circuit also comprises an EMI suppression filter circuit and a bridge rectifier, and described thermistor is connected between described EMI suppression filter circuit and described bridge rectifier.
In one embodiment, the input of described EMI suppression filter circuit accesses described ac supply signal, the output of described EMI suppression filter circuit is connected to the input of described bridge rectifier by described thermistor, the output of described bridge rectifier exports described voltage signal to described standby voltage change-over circuit.
In one embodiment, described Switching Power Supply also comprises one and is connected to isolating switch circuit between described standby voltage change-over circuit and described relay drive circuit, described isolating switch circuit comprises a photoelectrical coupler, and described photoelectrical coupler makes the output signal of described standby voltage change-over circuit be sent to described relay drive circuit in the mode of single-phase transmission.
In one embodiment, described standby voltage change-over circuit comprises the output exporting described standby voltage, the first input end of described photoelectrical coupler is connected to the output of described standby voltage change-over circuit, the second input end grounding of described photoelectrical coupler by one the 3rd resistance; Between one the 4th resistance and described 3rd resistant series and the first input end being connected to described photoelectrical coupler and the second input; The output of described photoelectrical coupler is connected with described relay drive circuit thus controls unlatching or the off-state of described relay.
In one embodiment, described relay drive circuit comprises a triode be connected with described relay, the collector electrode of described triode and the first output of described photoelectrical coupler are connected to a power supply jointly, the base stage of described triode is connected with the second output of described photoelectrical coupler by one second resistance, and the emitter of described triode is connected with described relay by one first resistance.
In one embodiment, described relay drive circuit also comprises first diode in parallel with described relay, the negative pole of described first diode and terminals of described relay are connected with the emitter of described triode by described first resistance, and the negative pole of described first diode is connected with another terminals of described relay.
In one embodiment, described relay drive circuit also comprises one second diode, and the positive pole of described second diode is connected with the emitter of described triode, and the negative pole of described second diode is connected with the base stage of described triode.
In one embodiment, described relay drive circuit also comprises Zener diode, and the negative pole of described Zener diode is connected with the base stage of described triode, the plus earth of described Zener diode.
In one embodiment, described triode is bipolar npn triode.
Compared with prior art, above-mentioned Switching Power Supply, at booting moment, can utilize described thermistor to reduce start impulse current; After Switching Power Supply is opened completely, described relay makes described thermistor short circuit to reduce the energy consumption of Switching Power Supply.
Accompanying drawing explanation
Fig. 1 is the module map of Switching Power Supply one better embodiment of the present invention.
Fig. 2 is the circuit diagram of Fig. 1 breaker in middle power supply.
Main element symbol description
| Current rectifying and wave filtering circuit | 10 |
| EMI suppression filter circuit | 11 |
| AC power | 12 |
| Standby voltage change-over circuit | 20 |
| Control chip | 21 |
| Standby voltage output | 22 |
| Isolating switch circuit | 30 |
| Relay drive circuit | 40 |
| Electric capacity | C1~C12 |
| Inductance | L1-L2 |
| Diode | D1-D4 |
| Zener diode | ZD1 |
| Thermistor | NTC |
| Bridge rectifier | BD1 |
| Resistance | R1-R5 |
| Relay | K1 |
| Photoelectrical coupler | U1 |
| Transformer | T1 |
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1, in the present invention one better embodiment, a Switching Power Supply comprises current rectifying and wave filtering circuit 10, standby voltage change-over circuit 20, isolating switch circuit 30 and a relay drive circuit 40.
Refer to Fig. 2, described current rectifying and wave filtering circuit 10 comprises EMI suppression filter circuit 11, thermistor NTC and bridge rectifier BD1.The input of described EMI suppression filter circuit 11 is connected with an AC power 12, and described EMI suppression filter circuit 11 comprises electric capacity C4-C12, inductance L 1 and a L2 and resistance R5.Described EMI suppression filter circuit 11 comprises two outputs, and wherein an output is connected with the input 1 of described bridge rectifier BD1 by described thermistor NTC; Another input of described EMI suppression filter circuit 11 is connected with the input 3 of described bridge rectifier BD1.The output 2 of described bridge rectifier BD1 exports the voltage signal (HV) after rectification, output 4 ground connection of described bridge rectifier BD1; The positive pole of one polar capacitor C1 is connected with the output 2 of described bridge rectifier BD1, and negative pole is connected with the output 4 of bridge rectifier BD1.In one embodiment, described Switching Power Supply is started shooting the moment powered on, and the resistance of thermistor NTC is very large, impulse current when can reduce start.
Described standby voltage change-over circuit 20 is connected with the output 2 of described bridge rectifier BD1, comprises a transformer T1, a control chip 21 be connected with transformer T1, diode D3 and D4, electric capacity C2 and C3.The HV voltage signal that described bridge rectifier BD1 exports is converted to a standby voltage (Standby Voltage) by described standby voltage change-over circuit 20, and described standby voltage change-over circuit 20 comprises the standby voltage output 22 of the described standby voltage of an output.
Described isolating switch circuit 30 comprises the bleeder circuit and a photoelectrical coupler U1 that are made up of R3 and R4.The standby voltage that described standby voltage change-over circuit 20 exports is connected to the photoelectrical coupler U1 of described isolating switch circuit by the bleeder circuit be made up of resistance R3 and R4, described photoelectrical coupler U1 comprises light emitting source (as light-emitting diode) and is subject to light source (as phototriode), the signal of telecommunication only can single-phasely be transmitted, and have good buffer action to input, the output signal of telecommunication, there is good electrical isolation capabilities and antijamming capability.Described photoelectrical coupler U1 comprises two inputs be connected with light emitting source (light-emitting diode) and two outputs be connected with by light source (phototriode), this two input is connected with the two ends of described resistance R4 respectively, this two output one of them be connected with the power supply signal of 12V, this two output wherein another is connected with described relay drive circuit 40.One end of described resistance R3 is connected with the standby voltage output 22 of described standby voltage change-over circuit 20, and the other end of described resistance R3 is connected with the first input end of described resistance R4 and described photoelectrical coupler U1.One end of described resistance R4 is connected with the first input end of described resistance R3 and described photoelectrical coupler U1, and the other end of described resistance R4 is connected with second input of described photoelectrical coupler U1, second input end grounding of described photoelectrical coupler U1.
Described relay drive circuit 40 comprises a triode Q1, diode D1-D2, resistance R1-R2, Zener diode ZD1, an electric capacity C13 and a relay K 1.In one embodiment, described triode Q1 is a bipolar npn triode.The collector electrode of described triode Q1 is connected with an output of described photoelectrical coupler U1 and the power supply signal of described 12V, and base stage is connected with another output of described photoelectrical coupler with by described resistance R2, and emitter is connected with described resistance R1.The negative pole of described Zener diode ZD1 is connected with the base stage of described triode Q1, plus earth.The positive pole of described diode D2 is connected with the emitter of described triode Q1, and the negative pole of described diode D2 is connected with the base stage of described triode Q1.Described resistance R1 and electric capacity C13 is connected in series the emitter to described triode Q1 successively, and described diode D1 and relay K 1 are all in parallel with described electric capacity C13.The negative pole of described diode D1 and terminals of described relay K 1 are connected with the emitter of described triode Q1 by described resistance R1, and the negative pole of described diode D1 is connected with another terminals of described relay K 1.Described relay K 1 comprises a switch, and the ends A of this switch and B are connected to the two ends of described thermistor NTC respectively, and when relay K 1 is energized, described switch conduction, can make described thermistor NTC short circuit.
During described Switching Power Supply work, described bridge rectifier BD1 is exported to by described thermistor NTC after the ac supply signal of AC power 12 is carried out filtering by described EMI suppression filter circuit 11, in the moment that described Switching Power Supply is opened, the resistance of thermistor NTC is very large, can reduce the start impulse current inputing to described bridge rectifier BD1, described bridge rectifier BD1 exports to described standby voltage change-over circuit 20 after the voltage signal that described EMI suppression filter circuit 11 exports is carried out rectification, the voltage signal that described bridge rectifier BD1 exports is converted to standby voltage (standby voltage) by described standby voltage change-over circuit 20, described standby voltage exports the first input end of described photoelectrical coupler U1 to after the step-down of described resistance R3, the lumination of light emitting diode of described photoelectrical coupler U1, the output conducting of described photoelectrical coupler U1, thus the voltage signal exporting high level makes described triode Q1 conducting.After described triode Q1 conducting, described relay K 1 has electric current to flow through, and the switch of relay K 1 closes, and makes described thermistor NTC short circuit.
In the present invention one better embodiment, described Switching Power Supply is being started shooting the moment powered on, described standby voltage not yet changed out by described standby voltage change-over circuit 20, described photoelectrical coupler U1 disconnects, the base stage of described triode Q1 is low level, is thus in cut-off (disconnection) state, and described relay K 1 does not have electric current to flow through, the switch of described relay K 1 disconnects, and does not affect the normal work of described thermistor NTC.Described thermistor NTC is very large at the start shooting moment resistance that powers on of Switching Power Supply, and impulse current when can reduce start, prevents the electronic device burning out Switching Power Supply.After described Switching Power Supply is opened completely, described standby voltage changed out by described standby voltage change-over circuit 20, make described photoelectrical coupler U1 conducting, the base stage of described triode Q1 is high level, thus be in conducting (closing) state, described relay K 1 has electric current to flow through, and the switch of described relay K 1 closes, make described thermistor NTC short circuit, thus reduce unnecessary energy consumption.
Claims (10)
1. a Switching Power Supply, comprise a current rectifying and wave filtering circuit, described current rectifying and wave filtering circuit exports a voltage signal after carrying out filter rectification process to ac supply signal, it is characterized in that: described current rectifying and wave filtering circuit comprises a thermistor, described Switching Power Supply also comprises a standby voltage change-over circuit be connected with described current rectifying and wave filtering circuit and a relay drive circuit be connected with described standby voltage change-over circuit, described relay drive circuit comprises the relay be connected with described thermistor, described Switching Power Supply booting moment, described voltage signal is not yet converted to a standby voltage by described standby voltage, described relay is in off-state, described thermistor can reduce the start impulse current of described Switching Power Supply, after described Switching Power Supply is opened completely, described voltage signal is converted to a standby voltage by described standby voltage, and described relay is in closure state and makes described thermistor short circuit to reduce the energy consumption of Switching Power Supply.
2. Switching Power Supply as claimed in claim 1, it is characterized in that: described current rectifying and wave filtering circuit also comprises an EMI suppression filter circuit and a bridge rectifier, described thermistor is connected between described EMI suppression filter circuit and described bridge rectifier.
3. Switching Power Supply as claimed in claim 2, it is characterized in that: the input of described EMI suppression filter circuit accesses described ac supply signal, the output of described EMI suppression filter circuit is connected to the input of described bridge rectifier by described thermistor, the output of described bridge rectifier exports described voltage signal to described standby voltage change-over circuit.
4. Switching Power Supply as claimed in claim 1, it is characterized in that: described Switching Power Supply also comprises one and is connected to isolating switch circuit between described standby voltage change-over circuit and described relay drive circuit, described isolating switch circuit comprises a photoelectrical coupler, and described photoelectrical coupler makes the output signal of described standby voltage change-over circuit be sent to described relay drive circuit in the mode of single-phase transmission.
5. Switching Power Supply as claimed in claim 4, it is characterized in that: described standby voltage change-over circuit comprises the output exporting described standby voltage, the first input end of described photoelectrical coupler is connected to the output of described standby voltage change-over circuit, the second input end grounding of described photoelectrical coupler by one the 3rd resistance; Between one the 4th resistance and described 3rd resistant series and the first input end being connected to described photoelectrical coupler and the second input; The output of described photoelectrical coupler is connected with described relay drive circuit thus controls unlatching or the off-state of described relay.
6. Switching Power Supply as claimed in claim 5, it is characterized in that: described relay drive circuit comprises a triode be connected with described relay, the collector electrode of described triode and the first output of described photoelectrical coupler are connected to a power supply jointly, the base stage of described triode is connected with the second output of described photoelectrical coupler by one second resistance, and the emitter of described triode is connected with described relay by one first resistance.
7. Switching Power Supply as claimed in claim 6, it is characterized in that: described relay drive circuit also comprises first diode in parallel with described relay, the negative pole of described first diode and terminals of described relay are connected with the emitter of described triode by described first resistance, and the negative pole of described first diode is connected with another terminals of described relay.
8. Switching Power Supply as claimed in claim 7, it is characterized in that: described relay drive circuit also comprises one second diode, the positive pole of described second diode is connected with the emitter of described triode, and the negative pole of described second diode is connected with the base stage of described triode.
9. Switching Power Supply as claimed in claim 8, it is characterized in that: described relay drive circuit also comprises Zener diode, the negative pole of described Zener diode is connected with the base stage of described triode, the plus earth of described Zener diode.
10. Switching Power Supply as claimed in claim 9, is characterized in that: described triode is bipolar npn triode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310741964.7A CN104753327B (en) | 2013-12-30 | 2013-12-30 | Switching Power Supply |
| TW103101664A TW201526487A (en) | 2013-12-30 | 2014-01-16 | Switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310741964.7A CN104753327B (en) | 2013-12-30 | 2013-12-30 | Switching Power Supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104753327A true CN104753327A (en) | 2015-07-01 |
| CN104753327B CN104753327B (en) | 2017-09-19 |
Family
ID=53592569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310741964.7A Active CN104753327B (en) | 2013-12-30 | 2013-12-30 | Switching Power Supply |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104753327B (en) |
| TW (1) | TW201526487A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107306095A (en) * | 2016-04-14 | 2017-10-31 | 上海卡姆南洋医疗器械股份有限公司 | A kind of new impact wave height frequency high-tension circuit |
| CN113114022A (en) * | 2021-04-07 | 2021-07-13 | 珠海拓芯科技有限公司 | Resistance control module, power output circuit and air conditioner |
| CN113394997A (en) * | 2021-08-16 | 2021-09-14 | 南京威登等离子科技设备有限公司 | Digital constant-power high-voltage plasma power supply |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9874589B2 (en) | 2015-11-12 | 2018-01-23 | Zippy Technology Corp. | Inrush current recording module |
| DE102015121299B4 (en) | 2015-12-08 | 2017-08-10 | Zippy Technology Corp. | Peak current recording module |
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| CN102064719A (en) * | 2010-11-02 | 2011-05-18 | 深圳创维－Rgb电子有限公司 | LED (Light Emitting Diode) backlight power source circuit, backlight power source and multimedia device |
| US20120262140A1 (en) * | 2011-04-18 | 2012-10-18 | Innovolt, Inc. | Voltage Sag Corrector Using a Variable Duty Cycle Boost Converter |
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2013
- 2013-12-30 CN CN201310741964.7A patent/CN104753327B/en active Active
-
2014
- 2014-01-16 TW TW103101664A patent/TW201526487A/en unknown
Patent Citations (3)
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| CN102064719A (en) * | 2010-11-02 | 2011-05-18 | 深圳创维－Rgb电子有限公司 | LED (Light Emitting Diode) backlight power source circuit, backlight power source and multimedia device |
| US20120262140A1 (en) * | 2011-04-18 | 2012-10-18 | Innovolt, Inc. | Voltage Sag Corrector Using a Variable Duty Cycle Boost Converter |
| CN203056956U (en) * | 2012-12-24 | 2013-07-10 | 浙江倍得福电器有限公司 | Soft start circuit of switch power source |
Non-Patent Citations (1)
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| 张伟，曾成，张静: "一种高精度的自激式多路输出稳压开关电源的设计", 《通信电源技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107306095A (en) * | 2016-04-14 | 2017-10-31 | 上海卡姆南洋医疗器械股份有限公司 | A kind of new impact wave height frequency high-tension circuit |
| CN113114022A (en) * | 2021-04-07 | 2021-07-13 | 珠海拓芯科技有限公司 | Resistance control module, power output circuit and air conditioner |
| CN113394997A (en) * | 2021-08-16 | 2021-09-14 | 南京威登等离子科技设备有限公司 | Digital constant-power high-voltage plasma power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104753327B (en) | 2017-09-19 |
| TW201526487A (en) | 2015-07-01 |
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Effective date of registration: 20191216 Address after: Room 207, main office building, No.118 Longxing Road, Haining Economic Development Zone, Haining City, Jiaxing City, Zhejiang Province Patentee after: Haining Economic Development Industrial Park Development and Construction Co., Ltd Address before: 430205 Hubei city of Wuhan province Optics Valley East Lake New Technology Development Zone Road No. two Foxconn Technology Park Co-patentee before: Hon Hai Precision Industry Co., Ltd. Patentee before: Hongfujin Precision Industry (Wuhan) Co., Ltd. |